2. Madonna (53)

Madonna ruled the '80s with an iron fist and hasn’t exactly mellowed with age. The Queen of Pop continued to shock fans throughout the '90s with her hypersexual image, embraced her inner-earth mother for a minute at the turn of the century before reopening her much-frequented candy shop in 2008. Twitter’s new poster girl returned this year – bigger and bolder than ever. Her Super Bowl performance got everyone talking and MDNA recently became the iconic diva’s eighth No. 1 album. It seems that time hasn't wearied her thirst for chart domination one iota.